Forestry Measurement and Yield Concepts

The video tutorial introduces the concept of board feet, a standard unit of measurement in lumber, defined as a piece of lumber that is 12 inches by 12 inches by one inch, unplaned and green. It explains the peculiarities of this measurement, highlighting that it measures gross volume and not the final usable volume due to processes like drying and planing. In forestry, board feet is used to measure yield rather than volume, considering factors like slabs, taper, and kerf. The video also discusses log rules, such as the international quarter inch rule, and addresses the non-interchangeability of units like chords and tons in forestry. The tutorial concludes with resources for further learning and acknowledges contributors.

What is a board foot in lumber measurement?

• A piece of lumber that is 10 inches by 10 inches by 2 inches.

• A piece of lumber that is 12 inches by 12 inches by 2 inches.

• A piece of lumber that is 10 inches by 10 inches by 1 inch.

• A piece of lumber that is 12 inches by 12 inches by 1 inch.

Why does a 2x4 actually measure 1.5 by 3.5 inches?

• Because it is a nominal size used in construction.

• Because it is a standard size for all lumber.

• Because it is measured before being dried and planed.

• Because it is measured after being dried and planed.

What does the term 'yield' refer to in forestry?

• The total volume of a tree.

• The amount of usable lumber from a log.

• The weight of a tree.

• The height of a tree.

Which factor does NOT affect the yield of usable lumber from a log?

• Kerf

• Taper

• Color of the wood

• Slabs

What is the purpose of log rules in forestry?

• To estimate the age of trees.

• To determine the amount of lumber from a log.

• To measure the height of trees.

• To calculate the weight of logs.

What is a major grievance with forestry units?

• They are too expensive to use.

• They are outdated.

• They are non-interchangeable.

• They are too complex to understand.

Which unit is used to measure volume in forestry?

• Chords

• Tons

• Meters

• Board feet

What is the International Quarter Inch Rule?

• A rule for measuring the height of trees.

• A rule for estimating the weight of logs.

• A rule for determining lumber yield with specific assumptions.

• A rule for calculating the age of trees.

Why might an acre have zero board feet despite having 20 quarts?

• The trees are too tall.

• The lumber is too expensive.

• The trees are too young.

• The lumber is of poor quality.

What additional resources are provided in the video?

• A guide to measuring board feet.

• A list of recommended books.

• Links to articles and a YouTube channel.

• A tutorial on using forestry equipment.